cinelerra/panautos.C

   1 #include "automation.inc"
   2 #include "panauto.h"
   3 #include "panautos.h"
   4 #include "transportque.inc"
   5
   6 PanAutos::PanAutos(EDL *edl, Track *track)
   7  : Autos(edl, track)
   8 {
   9         type = AUTOMATION_TYPE_PAN;
  10 }
  11
  12 PanAutos::~PanAutos()
  13 {
  14 }
  15
  16
  17 Auto* PanAutos::new_auto()
  18 {
  19         return new PanAuto(edl, this);
  20 }
  21
  22 void PanAutos::get_handle(int &handle_x,
  23                 int &handle_y,
  24                 int64_t position,
  25                 int direction,
  26                 PanAuto* &previous,
  27                 PanAuto* &next)
  28 {
  29         previous = (PanAuto*)get_prev_auto(position, direction, (Auto* &)previous);
  30         next = (PanAuto*)get_next_auto(position, direction, (Auto* &)next);
  31
  32 // Constant
  33         if(previous->handle_x == next->handle_x &&
  34                 previous->handle_y == next->handle_y)
  35         {
  36                 handle_x = previous->handle_x;
  37                 handle_y = previous->handle_y;
  38                 return;
  39         }
  40
  41 // Interpolate
  42         int64_t total = labs(next->position - previous->position);
  43         double fraction;
  44         if(direction == PLAY_FORWARD)
  45         {
  46                 fraction = (double)(position - previous->position) / total;
  47         }
  48         else
  49         {
  50                 fraction = (double)(previous->position - position) / total;
  51         }
  52
  53         handle_x = (int)(previous->handle_x + (next->handle_x - previous->handle_x) * fraction);
  54         handle_y = (int)(previous->handle_y + (next->handle_y - previous->handle_y) * fraction);
  55 }
  56
  57 void PanAutos::dump()
  58 {
  59         printf("        PanAutos::dump %p\n", this);
  60                 printf("        Default: position %ld\n", default_auto->position);
  61                 ((PanAuto*)default_auto)->dump();
  62         for(Auto* current = first; current; current = NEXT)
  63         {
  64                 printf("        position %ld\n", current->position);
  65                 ((PanAuto*)current)->dump();
  66         }
  67 }
  68 /*
  69 //      Local Variables:
  70 //      mode: C++
  71 //      c-file-style: "linux"
  72 //      End:
  73 */